The earth isn't dying, the earth will be fine, it will recover over time, humanity on the other hand needs to be reduced.
If it isn't climate change, an epidemic or something else, then it will be war over resources some time in the future.
On the other hand, climate change will probably lead to war anyway, since resources like water and places to live will decrease from that, so war is probably in the future anyway, since world population continue to rise, especially since the Chinese seem to allow 3 children moving forward.